Where is the Missile Expansion in Research Lab Hydra (Metroid Prime Origins)?

The Missile Expansion is in Research Lab Hydra, Phendrana Drifts. To get there you need Missile Expansion, Space Jump, Morph Ball, Charge Beam, Morph Ball Bomb, Varia Suit, Wave Beam, Boost Ball, Super Missile, Spider Ball first (starting a new game).

What you need first

Starting a new game from Landing Site, get these first, in this order, then go to Research Lab Hydra (92 rooms in all):

1. Missile Expansion in Landing Site (0 rooms; needed for Missile Expansion (Missile))
2. Space Jump in Alcove (1 room; needed for Missile Expansion (Space Jump Boots))
3. Morph Ball in Ruined Shrine (10 rooms; needed for Missile Expansion (Morph Ball))
4. Charge Beam in Watery Hall (10 rooms; needed for Missile Expansion (Charge Beam))
5. Morph Ball Bomb in Burn Dome (7 rooms; needed for Missile Expansion (Morph Ball Bomb))
6. Varia Suit in Sunchamber (10 rooms; needed for Missile Expansion (Varia Suit))
7. Wave Beam in Chapel of the Elders (20 rooms; needed for Missile Expansion (Wave Beam))
8. Boost Ball in Phendrana Canyon (8 rooms; needed for Spider Ball (Boost Ball))
9. Super Missile in Observatory (10 rooms; needed for Spider Ball (Super Missile))
10. Spider Ball in Quarantine Cave (9 rooms; needed for Missile Expansion (Spider Ball))

Last stretch

From Quarantine Cave, door by door:

1. Quarantine Cave: go through the door to North Quarantine Tunnel → North Quarantine Tunnel (Wave Door; needs Wave Beam)
2. North Quarantine Tunnel: go through the door to Quarantine Access → Quarantine Access (Wave Door; needs Wave Beam)
3. Quarantine Access: go through the door to Ruined Courtyard → Ruined Courtyard
4. Ruined Courtyard: go through the door to Specimen Storage → Specimen Storage (Wave Door; needs Wave Beam)
5. Specimen Storage: go through the door to Research Entrance → Research Entrance (Wave Door; needs Wave Beam)
6. Research Entrance: go through the door to Hydra Lab Entryway → Hydra Lab Entryway (Wave Door; needs Wave Beam)
7. Hydra Lab Entryway: go through the door to Research Lab Hydra → Research Lab Hydra (Wave Door; needs Wave Beam)

More Missile Expansions

• Missile Expansion (Burn Dome)
• Missile Expansion (Crossway)
• Missile Expansion (Dynamo)
• Missile Expansion (Dynamo)
• Missile Expansion (Furnace)
• Missile Expansion (Gathering Hall)
• Missile Expansion (Hive Totem)
• Missile Expansion (Main Plaza)
• Missile Expansion (Main Plaza)
• Missile Expansion (Main Plaza)
• Missile Expansion (Ruined Fountain)
• Missile Expansion (Ruined Gallery)
• Missile Expansion (Ruined Gallery)
• Missile Expansion (Ruined Nursery)
• Missile Expansion (Ruined Shrine)
• Missile Expansion (Ruined Shrine)
• Missile Expansion (Training Chamber Access)
• Missile Expansion (Vault)
• Missile Expansion (Watery Hall)
• Missile Expansion (Watery Hall Access)
• Missile Expansion (Fiery Shores)
• Missile Expansion (Storage Cavern)
• Missile Expansion (Triclops Pit)
• Missile Expansion (Elite Control Access)
• Missile Expansion (Elite Research)
• Missile Expansion (Fungal Hall Access)
• Missile Expansion (Fungal Hall B)
• Missile Expansion (Main Quarry)
• Missile Expansion (Metroid Quarantine A)
• Missile Expansion (Metroid Quarantine B)
• Missile Expansion (Phazon Processing Center)
• Missile Expansion (Security Access A)
• Missile Expansion (Frost Cave)
• Missile Expansion (Gravity Chamber)
• Missile Expansion (Ice Ruins East)
• Missile Expansion (Ice Ruins East)
• Missile Expansion (Phendrana Shorelines)
• Missile Expansion (Phendrana Shorelines)
• Missile Expansion (Quarantine Monitor)
• Missile Expansion (Research Lab Aether)